Helichrysum plant named ‘Lemon’

ABSTRACT

A plant variety of the  Helichrysum  family resulting from a controlled crossing of the patented variety  Helihrysum bracteatum×splendidum  ‘Harvest Sun II’ (the subject of U.S. Plant Pat. No. 11,800) and  Helichrysum bracteatum  ‘Harvest Plum’ (the subject of U.S. Plant Pat. No. 10,742). The new variety named ‘Lemon’ has blooms of R.H.S. 5 B (yellow group). The new variety has an erect but compact growth habit, and can be easily forced in pots.

Botanical classification: Helichrysum bracteatum×splendidum.

Variety denomination: ‘Lemon’.

BACKGROUND OF THE INVENTION

The present invention relates to a new and distinct variety of the Compositae family. The new variety is named Helichrysum bracteatum×splendidum ‘Lemon’.

This new Helichrysum variety originated as a seedling. It was selected from the progeny of a controlled hybridization conducted by the inventor in a commercial nursery in the city of Half Moon Bay. Half Moon Bay is located in San Mateo County, in the state of California.

The inventor crossed Helichrysum bracteatum×splendidum ‘Harvest Sun II’ (the subject of U.S. Plant Pat. No. 1,800) and Helichrysum bracteatum ‘Harvest Plum’ (the subject of U.S. Plant Pat. No. 10,742) to produce the new variety, Helichrysum bracteatum ‘Harvest Plum’ was the seed parent. The new variety was selected for commercial development because of its unique flower head color and compact growth habit. The new variety is particularly suitable for commercial plant culture because of its long-lasting flowers and attractive coloring.

Other desirable characteristics of the new variety are: the color of its flower head and bud, its dense foliage and strong stems, its compact growth habit, and its ability to grow well in pots in which it can be sold.

The infloresence is made up of a number of involucral bracts, surrounding a disk head. The outermost involucral bracts of the bud are R.H.S. 160 D (greyed-yellow group) at their tips. The rest of the bracts are R.H.S. 5 B (yellow group). Coloring of bracts on the upperside of the flower head gives the flower head a uniform appearance of R.H.S. 5B (yellow group) at maturity.

The following table compares the new variety to the closest varieties known to the inventor, according to the new variety's distinguishing characteristics. The variety designated ‘1A93’ is a progeny of a cross between Helichrysum splendidum (Thunb.) Less. and Helichrysum bracteatum (Venten.) Andr. The variety designated ‘Harvest Sun’ is the progeny of a cross between the variety designated ‘1A93’ and Helichrysum bracteatum (Vent.). Andr.

TABLE 1 H. bracteatum (general characteristics) H. splendidum ‘1A93’ ‘Harvest Sun’ Bract Various Involucral R.H.S. Involucral color colors bracts at 4A bracts at opening are opening are predominantly predominantly R.H.S. 12A. R.H.S. 22A. Upper Upper involucral involucral bracts when bracts when flower head flower head is mature are is mature are predominantly predominantly R.H.S. 12A. R.H.S. 9A. Bud Various Predominantly R.H.S. R.H.S. 26A color colors R.H.S. 175A. 187B Leaf Puberulent Tomentose puberulent puberulent surfaces and and sparsely sparsely villous, main villous, veins are main hirsute veins are hirsute Suitability Good Average Good Good for pot culture Ease of Generally Difficult Good Good forcing good Growth Generally Spreading Compact Compact habit compact ‘Harvest Plum’ ‘Harvest Sun II’ New Variety Bract Bract tips: R.H.S. 12A. R.H.S 5 B color R.H.S. 66D. Bract base: R.H.S. 155C. (Tip color dominates in all but innermost bracts.) Bud Bract tips: R.H.S. 26A. R.H.S. 160 D color R.H.S. 187A. (greyed- Bract base: yellow group) R.H.S. 67B. Leaf Puberlent puberulent and Puberulent surfaces sparsely villous, main veins are hirsute Suitability Good Good Good for pot culture Ease of Good Good Good forcing Growth Compact Compact Compact habit

The distinguishing characteristics are retained by asexually reproduced, successive generations. The inventor, at a commercial nursery in Half Moon Bay, Calif., has asexually reproduced the new variety through three successive generations by means of cuttings and has found that the combination of characteristics as herein disclosed remain firmly fixed.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings consist of color photographs that show the typical potted-plant form, including the inflorescence, foliage, and bract color development from the bud stage to the mature flower head. The colors are represented as truly as possible using conventional photographic procedures.

FIG. 1 is a perspective view of a potted plant of the new variety described herein, illustrating the overall form and appearance of the plant in full bloom.

FIG. 1 is a perspective view of a potted plant of the new variety described herein, illustrating the overall form and appearance of the plant in full bloom.

FIG. 2 is a perspective view of a potted plant of the new variety described herein, illustrating the overall form and appearance of the plant in full bloom.

FIG. 3 is a top view of a potted plant of the new variety described herein, illustrating the overall form and appearance of the plant in full bloom.

FIG. 4 is a perspective view of a potted plant of the new variety described herein, Illustrating the overall form and appearance of the plant in full bloom.

FIG. 5 is a view of one stem removed from the plant.

FIG. 6 is a view of one stem removed from the plant.

FIG. 7 is a top view of two individual flower heads of the new variety described herein, showing the pigmentation pattern of the bracts.

FIG. 8 is a top view of two individual flower heads of the new variety described herein, showing the pigmentation pattern of the bracts.

FIG. 9 is a view of the undersides of two individual flower heads of the new variety described herein, showing the pigmentation pattern of the bracts.

FIG. 10 is a view of the undersides of two individual flower heads of the new variety described herein, showing the pigmentation pattern of the bracts.

DETAILED DESCRIPTION OF THE NEW VARIETY

The following is a detailed description of the new variety. The new variety has not been observed under all possible environmental conditions. Color designation and other values stated may deviate slightly from the stated values from flowering to flowering, but the deviations will be within the range expected from varying environmental, seasonal and cultural conditions. Color designations were made according to the R.H.S. Colour Chart published by The Royal Horticultural Society of London, England.

The following description is based on observations of optimally fertilized plants grown outside in 6 inch pots.

The observed plants were 20 weeks old.

The plants were grown under glass in Half Moon Bay, Calif. during the winter and spring months. The day time temperature in the green house where the plants were grown was kept between 65 and 73 degrees Fahrenheit during the day and 65 degrees Fahrenheit at night. The humidity was maintained at 90%.

-   The plant:     -   -   Name.—Helichrysum bracteatum×splendidum ‘Lemon’.         -   Origin.—Seedling.         -   Parentage.—Helichrysum bracteatum×splendidum ‘Harvest Sun             II’ and Helichrysum bracteatum ‘Harvest Plum’ (the subject             of U.S. Plant Pat. No. 10,742). Helichrysum bracteatum             ‘Harvest Plum’ was the seed parent.         -   Classification.—Family. — Compositae. Tribe. — Inula. Genus.             — Helichrysum. Species. — bracteatum×splendidum. Commercial.             — Strawflower.         -   Form.—Upright, compact, biennial herb.         -   Height.—Plant grown in 6″ pot is 28 cm.         -   Diameter.—Plant grown in 6″ pot is 30 cm.         -   Growth.—Upright, vigorous growth under glass with excellent             branching; easily forced to bloom without growth regulators.         -   Stems.—Texture. — Generally, stems are moderately pubescent             at their base; stems are very sericeous below the flower,             making for a glaucous appearance. Shape. — Stems have a             rectangular cross section below the base of the flower             becoming round at base. Size. — Stem width at top of plant             below the terminal flower head is 5 mm. The stem widens in             one direction to accommodate axilary stems, becoming             approximately 10 mm wide. Where stems meet the original             cutting, the stems are approximately 8 mm to 11 mm wide. The             diameter of the original cutting is 15 mm.         -   Foliage.—Quantity. — Abundant. Shape. — Linear; narrowly             acute; margins are repand; pinnately veined. Size. — As             large as 16 cm long by 37 mm wide. Texture. — Viscid; main             vein dominates on the underside of leaf and is sunken on the             leaf surface. Pubescence. — Leaf surfaces are puberulent.             Color. — Upper leaf surface is R.H.S. 137A to 137B (green             group); lower leaf surface is R.H.S. 137C (green group).         -   Disease resistance.—Roots appear not to be subject to any             particular root disease known to the inventor. -   BUDS:     -   -   Form.—Conical, with imbricate involucral bracts.         -   Texture.—Smooth and glossy (waxy).         -   Rate of opening.—Slowly, and in layers, closing at night;             fully open in 2-3 weeks.         -   Involucral bracts.—Color. — Outermost involucral bracts are             R.H.S. 160 D (greyed-yellow group). As bud opens, a first             group of inner bracts become visible. This group of bracts             are colored R.H.S. 5 B (yellow group).         -   Aspect.—Thin, dry, membranous. -   The inflorescence:     -   -   Form.—Flower head is discoid and solitary; usually 1 or 2             buds at the next leaf axis below.         -   Flower head size.—Diameter. — 58 mm. Disc floret portion             diameter. — 24-25 mm.         -   Shape of the flower head.—Circular; involucral bracts are             numerous and imbricate.         -   Appearance of the flower head.—Showy.         -   Involucral bracts.—Form. — Involucral bracts are imbricate             in many rows. Involucral bracts are scarious and membranous,             but are brightly colored. The involucral bracts are deltoid,             enlarged and petal-like. Color. — The bracts on the             upperside of the flower head are R.H.S. 5B (yellow group).             Coloring of bracts on the upperside of the flower gives the             flower a uniform appearance of R.H.S. 5B (yellow group) at             maturity. Size and number. — Involucral bracts range from 10             mm to 20 mm long and 3 mm to 10 mm wide, and there can be as             many as 100 involucral bracts on a flower head.         -   Disc florets.—Form. — Florets are all small, bisexual and             tubular. The corolla of the florets is usually 5-lobed.             Corolla is usually 7-9 mm long and glaucous (waxy). The             upper 3.5 mm of the corolla is usually brightly colored,             R.H.S. 24A (orange group). Androecium. — There are usually 5             stamens borne on the corolla tube. The stamens, including             the anthers, are usually united into a tube around the style             and become highly reflexed from the point of separation. The             stamens protrude from the corolla. Pollen occurs on the             adaxial surface of the anthers. Gynoecium. — One pistil per             disc floret. The ovary is inferior, and approximately 2 mm             tall. The style is often branched. The style protrudes from             the corolla about 2 to 3 mm. There is a pappus with many             bristles. The bristles are approximately 8 mm long. Color of             the bristles is R.H.S. 10D (yellow group).         -   Persistence.—9 weeks.         -   Fragrance.—None.         -   Achenes.—The achenes rarely germinate. 

1. A new and distinct variety of Helichrysum plant, as illustrated and described. 